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The article was based on a return trip of 2.7 years. That's just about unreasonably long for anyone, and Bob Zubrin's Mars Direct plan got it down to 180 days each way using a Hohmann transfer, as I recall.
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The article was based on a return trip of 2.7 years. That's just about unreasonably long for anyone, and Bob Zubrin's Mars Direct plan got it down to 180 days each way using a Hohmann transfer, as I recall.